Yes, she was very stupid!
Yes, the American authorities, in their inevitable way, overreacted!
Would a terrorist carrying a bomb declare the fact - twice, and then allow himself/herself to be arrested without setting it off?
She should have been held for 24 hours, given a severe reprimand and warned that if she ever did anything like that again she would then have to take the full consequences. As it is, six months just waiting for trial is simply OTT.
God Bless America!